Top-down processing involves the

a. brain's ability to integrate several stimuli simultaneously

b. brain's use of incoming signals to construct perceptions

c. brain tuning into select information

d. brain imposing its own structure on incoming information based on previous experience

Answer;

Brain imposing its own structure on incoming information based on previous experience

Explanation;Top-down processing is the perceptual processing which memory and other cognitive processes are required for interpreting incoming sensory info.It involves use of knowledge that people have gained from prior experience with stimuli to perceive them. The information processing is guided by our experience and expectations.

Low temperature - this decreases the Kinetic energy of the particles in the reaction, hence lowering the collision rate and decreasing the chance of the activation energy being achieved decreasing the chance a successful reaction will occur.